In an injection molding machine configured to extrude a melted resin under temperature control and inject the resin into metal molds to provide a molded product, there are provided an HMI section having a built-in general-purpose operating system and configured to control a display section equipped with a touch panel, control modules, such as a main control section, a sequence processing section and a servo command section, having a dedicated microprocessor for each control element of the injection molding machine, and a driver section having servo amplifiers, hydraulic drivers, and so on, configured to be controlled by the control modules and to drive-control an actuator of the injection molding machine, in which, by variously combining together the control modules, it is possible to provide various kinds of injection molding machines, that is, an electric operation type, a hydraulic type and a hybrid type of these combination.